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Just got back from the Inspection centre to remove my Yellow Sticker, After chattting to the guy, he says that POD filters are legal now. As long as the intake arm is secured to the chassis firmly and all your stock sensors and emission hoses are plugged in they are fine. This has just changed here in WA dunno if the other states have thou?
because the pastic absorbs the noise, thats why the use long complicated induction pipes as standard
I can see where CRX-boy is coming from but you are slightly off mate.
Your correct in saying that there is a vacuum created between the piston and the end of the filter.
Stock intake = restrictive, more vacuum
POD = low restriction less vacuum
Now say the effort the engine is putting in is constant between both intakes, therefor this effort can be represented by a constant power(ie my 600watt dyson vacuum cleaner)
Now this vacuum cleaner, is it going to suck up more dirt off my floor with more vacuum or less? More vaccum of course! But doesn't it do this with my restrictive ribbed vaccum hose???
Now think of dirt as oxygen. Is an engine with more or less vaccum going to suck in more oxygen?
yea that may be the case but try and explain that to the cops, with his bling bling uniforn he thinks he rules the dam country, ever heard this??
"anything not stock is a defect"
that includes rust and tailpipes!! beleve me as iv had these defects
umm ur confused,....
the reason the vacume gose down is because the cylinder is getting filled properly and dosent need more air
instead of counting dust u should feel the exhaust runner on ur vacume and tell me when u feel more air as its comeing out
please dont correct my posts unless uv thought about what ur saying
and my LG vaccum is 1600Watt - feel the burn yea..... lolz
its all in the aiflow characteristics.Quote:
Originally Posted by mugeneration
why do cannons sound loud an any 4cyl car... the moment you have turbo it goes quieter....
not disputing what you say... i actually agree that the stock box is the most superior in terms of overall power gain throughout the rpm range based on dyno testing and the many dynos of different setups i've collected.Quote:
Originally Posted by Setanta
in other peoples cases say mine from example...
going from 9.5:1 CR to 11:1 and adding aggressive high lift/duration cams soon... i will need the more free flowing effect certain materials in PODs have to allow for the bigger vaccum created by the demand of higher CR and big dur/lift cams... and in the name of getting the most air before the 3rd stroke to create more hp/tq.
that said i use a VERY free flowing pod that utilises a foam element... flows very well like theres no fitler there but we all know such material does SFA in filtering anyway.....
As soon as you start modifying the characteristics of the engines internals, then yes, you will need a better induction system if yours has hit peak in slightly modified trim, aka a panel filter.
EG: My SiR put down 86 KW @ FW last run (2 years ago). That's stock for it's JDM spec with just the filter I use - as in 160ps @ FW. The results we were getting on the bench have led me to believe that the current setup will be good to approx 180ps with mods but after that will become a limiting factor.
With a rebuild (300,000 kms on the B16A) on the cards, I'm researching and collecting internal mods. But my goal is to ensure the car always looks stock, so I have picked up a few extra EF8/9 airboxes and am currently modifying them to improve airflow in a stealth manner as I know the limitations of my existing setup.
For someone who is simply putting a Pod on and not modifying extensively like you have, it's not necessary, and in NSW and Vic, Pods are trouble with an over zealous defender of the law - hence me doing the stealth route.
The main gain you will get with a pod filter on an otherwise unmodified NA car is better throttle response as you are lessening a point of restriction in the intake system.
The panel filter in a stock EG measures approximately 180mm x 180mm. By comparison, my J's Racing Pod has a surface area of approcimately 600mm x 100mm giving it roughly twice the available surface area to filter air (not taking into account the surface area of the ribs on either filter), it is also made of far less restrictive material (wire cased oiled cotton as opposed to treated paper).
Your car will no be sucking in a greatly different volume of air to what is taken through the stock filter but wil be able to take it in quicker and with a higher density of oxygen. This is why it is often said that a pod equipped car revs harder and has a more responsive throttle. The higher oxygen density means that the car will run slightly lean and will get slightly better fuel economy (depending on how restrictive the original equipment is, maybe 5 - 10 km more per tank).
A properly set up SRI with a forced cold air feed will always give better gains than the stock equipment even with an aftermarket panel filter (same surface area but less restrictive, misses out on the extra surface area) but no really dramatic gains will be made with a filter modification of any sort unless other modifications are made which complement it (eg: optimised exhaust, advanced timing, reflashed ecu, cams etc).
thanks people you have all been a great help.
now which trader(s), have and can give a good price air intake kit??
anyone?
what are people's opinions on the Mugen air box? it has cai and sits a pob filter in the top
Yup same has happened to me. Just rem to ask for his name and badge number, it usually make them perk up that they are gonna be checked on. NSW RAT allows modification so long as it does not break the noise limits and pollution levels. There are some other things to that but most cops think that anything not standard is a reason for them to catch you for easy pickings.
I'd print out the RTA modification book and show them what the law actually says in relation to mods.
P.S also get him to point out which section of they are booking you for.
Quote:
Originally Posted by crx_boy7